window.onload = function() {
	window.Router = new Router();
	window.Router.init();
	var content = document.querySelector('body');
	// change Page anything
	function changeBgColor(color) {
		content.style.backgroundColor = color;
	}
	Router.route('/', function() {
		changeBgColor('white');
	});
	Router.route('/orange', function() {
		changeBgColor('orange');
	});
	Router.route('/purple', function() {
		changeBgColor('purple');
	});
}